Fast replacement of submersible tundish nozzles in a continuous slab-casting machine

Eron’ko, S. P.; Oshovskaya, E. V.; Tkachev, M. Yu.

doi:10.3103/s0967091216010034

Cited by 8 publications

(3 citation statements)

References 2 publications

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“…Taking into account the high technical and economic efficiency of the use of laser quenching for ejectors and punches, it is planned to apply the developed approach for another die for hot deformation [26][27][28][29][30].…”

Section: Discussionmentioning

confidence: 99%

Improving the Thermal Fatigue Strength of Hot-Working Tools by Laser Treatment

Chichenev

2022

Materials Research Proceedings

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Abstract. A method for increasing the thermal fatigue strength of a tool used in hot forming of bearing rings by applying circular laser tracks to the working surfaces is considered. Laser treatment is carried out with a power of 2.0...2.5 kW by applying on the end face working surface of the tool in the direction from the center to the periphery of the circular tracks with a common center coinciding with the center of the circumference of the end face; the tool is rotated at a constant angular rate, the spot diameter ds for each track is selected according to the dependence ds,i+1/ds,i = 0.85...0.90, and the laser radiation spots of adjacent tracks have a common point of contact. The results of pilot testing are presented, which confirmed the high technical and economic efficiency of the use of laser quenching for ejectors and punches. A tool made by machining, for example, an ejector of an AMP-70 automatic press, is subjected to volume quenching and tempering. The ejector material was steel 3Kh3M3F, quenching temperature in oil – 1030...1050 °С, tempering temperature – 580...610 °С. After volume quenching, additional machining is carried out, usually grinding, in order to remove the decarbonized layer of material formed during heat treatment and to give the working surface the required roughness class. The final stage in the tool manufacturing is the quenching of its working surface by laser treatment. Pilot testing showed that the use of laser treatment made it possible to increase the durability of ejectors of various types by 2 ... 3 times, of deforming punches – by 2.2 times.

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Section: Discussionmentioning

confidence: 99%

Improving the Thermal Fatigue Strength of Hot-Working Tools by Laser Treatment

Chichenev

2022

Materials Research Proceedings

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“…This technology allows to manufacture finished products of complex shapes [22][23][24][25][26][27][28][29][30]. Wettability, surface tension, and melt viscosity play an important role in the product manufacture [31][32][33][34]. A factor that prevents the use of various metals and alloys for SLM is the "spheroidization" effect manifested in the formation of separately lying drops, rather than a solid melting trace.…”

Section: Objects and Methods Of Researchmentioning

confidence: 99%

Additive Technology Methods for Manufacturing Permanent Magnets

et al. 2021

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The paper presents the results of studying the possibility of using the selective laser melting method for production of permanent magnets. This process allows to manufacture not only product models and prototypes, but also finished functional products by adding material layer by layer and bonding particles and layers to each other. We have considered the application areas of selective laser melting (SLM) based on powders obtained by different methods for the study. In addition, we have analyzed the traditional magnetic alloy casting technology, studied magnetic materials, and compared the powder magnet properties with standard data. We have found that the parameters of powders obtained by gas atomization are qualitatively superior to those of powders obtained using other methods, whereas the resulting magnets meet the requirements for magnets. Based on the 25Kh15KA alloy powder atomized by gas atomization, a SLM plant allows to manufacture permanent magnets with a material density of 7.59–7.55 g/cu.cm, which meets the requirements recommended by the State Standard GOST 24897-81, and to obtain the magnet properties that can be achieved using traditional metallurgical technologies.

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“…The experience of domestic forging and pressing shops shows that it is possible to achieve metal saving and improve the forging quality both through the introduction of low-waste and energysaving technologies using high-quality ingots (electroslag remelted, evacuated, etc. ), and through the improvement of process flows and forging modes [9][10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Forging Process Flow Development for Plate Production

Кобелев

Valeeva

Gerasimova

2021

SSP

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Developed on the basis of the pilot and industrial work results, a process flow for the production of mono-block plates with 7600x7600x360 mm dimensions from a 290-ton ingot for subsequent 15H2NMFA steel bottom stamping, was carried out. A practical implementation of the developed procedure for the bottom production from mono-block large-sized plates was made. The basic technology for the mono-block plate production was applied in the conditions of Izhorskiye Zavody, OJSC and Atommash, OJSC, this technology provides for a minimum amount of reconstruction of the existing facilities of these enterprises.

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Fast replacement of submersible tundish nozzles in a continuous slab-casting machine

Cited by 8 publications

References 2 publications

Improving the Thermal Fatigue Strength of Hot-Working Tools by Laser Treatment

Improving the Thermal Fatigue Strength of Hot-Working Tools by Laser Treatment

Additive Technology Methods for Manufacturing Permanent Magnets

Forging Process Flow Development for Plate Production

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